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Calculation Of Net Income Per Share (Tables) | 6 Months Ended
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Jun. 30, 2023
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] | The following table presents the computation of weighted-average shares used in the calculation of basic and diluted earnings per share:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In millions)
Weighted-average shares of common stock outstanding | 103.9 |  | 108.8 |  | 104.4 |  | 109.5
Weighted-average potential shares of common stock outstanding: |  |  |  |  |  |  |
Unvested RSUs and ESPP | 0.1 |  | — |  | 0.1 |  | 0.1
Shares used to compute diluted earnings per share | 104.0 |  | 108.8 |  | 104.5 |  | 109.6

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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